diff options
| author | Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> | 2014-01-25 00:09:05 +0100 |
|---|---|---|
| committer | Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> | 2014-02-25 21:16:09 +0100 |
| commit | e91f7916eaa6751ce61ae151875280784c587267 (patch) | |
| tree | f0630a492f8372fbe44bd71a78bcd9801ea5cfd0 /drivers/pinctrl | |
| parent | 4d73fc7728515d11fedff5b3ea7f2e03a84dfd60 (diff) | |
| download | linux-e91f7916eaa6751ce61ae151875280784c587267.tar.gz linux-e91f7916eaa6751ce61ae151875280784c587267.tar.bz2 linux-e91f7916eaa6751ce61ae151875280784c587267.zip | |
pinctrl: mvebu: dove: request syscon regmap for global registers
Dove pinctrl uses some global config registers to control pins.
This patch requests a syscon regmap for those registers. As this
changes DT to driver requirements, fallback to a self-registered
regmap with hardcoded resources, if the corresponding syscon DT
node is missing. Also, WARN about old DT binding usage to encourage
users to update their DTBs.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/mvebu/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/pinctrl/mvebu/pinctrl-dove.c | 27 |
2 files changed, 28 insertions, 0 deletions
diff --git a/drivers/pinctrl/mvebu/Kconfig b/drivers/pinctrl/mvebu/Kconfig index 366fa541ee91..8dc4948c1202 100644 --- a/drivers/pinctrl/mvebu/Kconfig +++ b/drivers/pinctrl/mvebu/Kconfig @@ -8,6 +8,7 @@ config PINCTRL_MVEBU config PINCTRL_DOVE bool select PINCTRL_MVEBU + select MFD_SYSCON config PINCTRL_KIRKWOOD bool diff --git a/drivers/pinctrl/mvebu/pinctrl-dove.c b/drivers/pinctrl/mvebu/pinctrl-dove.c index 8d57d4bc1f0c..e4f954a78b15 100644 --- a/drivers/pinctrl/mvebu/pinctrl-dove.c +++ b/drivers/pinctrl/mvebu/pinctrl-dove.c @@ -18,7 +18,9 @@ #include <linux/clk.h> #include <linux/of.h> #include <linux/of_device.h> +#include <linux/mfd/syscon.h> #include <linux/pinctrl/pinctrl.h> +#include <linux/regmap.h> #include "pinctrl-mvebu.h" @@ -26,6 +28,7 @@ #define INT_REGS_MASK ~(SZ_1M - 1) #define MPP4_REGS_OFFS 0xd0440 #define PMU_REGS_OFFS 0xd802c +#define GC_REGS_OFFS 0xe802c #define DOVE_SB_REGS_VIRT_BASE IOMEM(0xfde00000) #define DOVE_MPP_VIRT_BASE (DOVE_SB_REGS_VIRT_BASE + 0xd0200) @@ -59,6 +62,7 @@ static void __iomem *mpp_base; static void __iomem *mpp4_base; static void __iomem *pmu_base; +static struct regmap *gconfmap; static int dove_mpp_ctrl_get(unsigned pid, unsigned long *config) { @@ -756,6 +760,13 @@ static struct of_device_id dove_pinctrl_of_match[] = { { } }; +static struct regmap_config gc_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .max_register = 5, +}; + static int dove_pinctrl_probe(struct platform_device *pdev) { struct resource *res, *mpp_res; @@ -808,6 +819,22 @@ static int dove_pinctrl_probe(struct platform_device *pdev) if (IS_ERR(pmu_base)) return PTR_ERR(pmu_base); + gconfmap = syscon_regmap_lookup_by_compatible("marvell,dove-global-config"); + if (IS_ERR(gconfmap)) { + void __iomem *gc_base; + + dev_warn(&pdev->dev, "falling back to hardcoded global registers\n"); + adjust_resource(&fb_res, + (mpp_res->start & INT_REGS_MASK) + GC_REGS_OFFS, 0x14); + gc_base = devm_ioremap_resource(&pdev->dev, &fb_res); + if (IS_ERR(gc_base)) + return PTR_ERR(gc_base); + gconfmap = devm_regmap_init_mmio(&pdev->dev, + gc_base, &gc_regmap_config); + if (IS_ERR(gconfmap)) + return PTR_ERR(gconfmap); + } + /* Warn on any missing DT resource */ WARN(fb_res.start, FW_BUG "Missing pinctrl regs in DTB. Please update your firmware.\n"); |